diff --git a/shell/platform/darwin/ios/framework/Source/FlutterEnginePlatformViewTest.mm b/shell/platform/darwin/ios/framework/Source/FlutterEnginePlatformViewTest.mm
index 0b5526a5341a2..516cb8c8c826a 100644
--- a/shell/platform/darwin/ios/framework/Source/FlutterEnginePlatformViewTest.mm
+++ b/shell/platform/darwin/ios/framework/Source/FlutterEnginePlatformViewTest.mm
@@ -72,7 +72,9 @@ - (void)setUp {
                                /*io=*/thread_task_runner);
   platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/fake_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/fake_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -90,8 +92,13 @@ - (void)tearDown {
 }
 
 - (void)testMsaaSampleCount {
-  // Default should be 1.
-  XCTAssertEqual(platform_view->GetIosContext()->GetMsaaSampleCount(), MsaaSampleCount::kNone);
+  if (fake_delegate.settings_.enable_impeller) {
+    // Default should be 4 for Impeller.
+    XCTAssertEqual(platform_view->GetIosContext()->GetMsaaSampleCount(), MsaaSampleCount::kFour);
+  } else {
+    // Default should be 1 for Skia.
+    XCTAssertEqual(platform_view->GetIosContext()->GetMsaaSampleCount(), MsaaSampleCount::kNone);
+  }
 
   // Verify the platform view creates a new context with updated msaa_samples.
   // Need to use Metal, since this is ignored for Software/GL.
diff --git a/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsTest.mm b/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsTest.mm
index 1e6dad56089aa..2d630c870be11 100644
--- a/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsTest.mm
+++ b/shell/platform/darwin/ios/framework/Source/FlutterPlatformViewsTest.mm
@@ -89,6 +89,7 @@ @implementation FlutterPlatformViewsTestMockFlutterPlatformFactory
 namespace flutter {
 namespace {
 class FlutterPlatformViewsTestMockPlatformViewDelegate : public PlatformView::Delegate {
+ public:
   void OnPlatformViewCreated(std::unique_ptr<Surface> surface) override {}
   void OnPlatformViewDestroyed() override {}
   void OnPlatformViewScheduleFrame() override {}
@@ -117,7 +118,6 @@ void LoadDartDeferredLibraryError(intptr_t loading_unit_id,
   void UpdateAssetResolverByType(std::unique_ptr<flutter::AssetResolver> updated_asset_resolver,
                                  flutter::AssetResolver::AssetResolverType type) override {}
 
- private:
   flutter::Settings settings_;
 };
 
@@ -148,7 +148,9 @@ - (void)testFlutterViewOnlyCreateOnceInOneFrame {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -204,7 +206,9 @@ - (void)testCanCreatePlatformViewWithoutFlutterView {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -258,7 +262,9 @@ - (void)testApplyBackdropFilter {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -330,7 +336,9 @@ - (void)testApplyBackdropFilterWithCorrectFrame {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -402,7 +410,9 @@ - (void)testApplyMultipleBackdropFilters {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -475,7 +485,9 @@ - (void)testAddBackdropFilters {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -588,7 +600,9 @@ - (void)testRemoveBackdropFilters {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -725,7 +739,9 @@ - (void)testEditBackdropFilters {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1002,7 +1018,9 @@ - (void)testApplyBackdropFilterNotDlBlurImageFilter {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1302,7 +1320,9 @@ - (void)testCompositePlatformView {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1358,7 +1378,9 @@ - (void)testBackdropFilterCorrectlyPushedAndReset {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1452,7 +1474,9 @@ - (void)testChildClippingViewShouldBeTheBoundingRectOfPlatformView {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1523,7 +1547,9 @@ - (void)testClipsDoNotInterceptWithPlatformViewShouldNotAddMaskView {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1590,7 +1616,9 @@ - (void)testClipRRectOnlyHasCornersInterceptWithPlatformViewShouldAddMaskView {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1656,7 +1684,9 @@ - (void)testClipRect {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1729,7 +1759,9 @@ - (void)testClipRRect {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1802,7 +1834,9 @@ - (void)testClipPath {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1876,7 +1910,9 @@ - (void)testSetFlutterViewControllerAfterCreateCanStillDispatchTouchEvents {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1940,7 +1976,9 @@ - (void)testSetFlutterViewControllerInTheMiddleOfTouchEventShouldStillAllowGestu
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2061,7 +2099,9 @@ - (void)testSetFlutterViewControllerInTheMiddleOfTouchEventShouldStillAllowGestu
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2172,7 +2212,9 @@ - (void)testFlutterPlatformViewTouchesCancelledEventAreForcedToBeCancelled {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2234,7 +2276,9 @@ - (void)testFlutterPlatformViewControllerSubmitFrameWithoutFlutterViewNotCrashin
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2296,7 +2340,9 @@ - (void)testFlutterPlatformViewControllerSubmitFrameWithoutFlutterViewNotCrashin
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2346,7 +2392,9 @@ - (void)testFlutterPlatformViewControllerBeginFrameShouldResetCompisitionOrder {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2402,7 +2450,9 @@ - (void)testFlutterPlatformViewControllerBeginFrameShouldResetCompisitionOrder {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2500,7 +2550,9 @@ - (void)testFlutterPlatformViewControllerBeginFrameShouldResetCompisitionOrder {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2598,7 +2650,9 @@ - (void)testThreadMergeAtEndFrame {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2752,7 +2806,9 @@ - (void)testClipMaskViewIsReused {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2834,7 +2890,9 @@ - (void)testDifferentClipMaskViewIsUsedForEachView {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2934,7 +2992,9 @@ - (void)testDisposingViewInCompositionOrderDoNotCrash {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -3042,7 +3102,9 @@ - (void)testOnlyPlatformViewsAreRemovedWhenReset {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
diff --git a/shell/platform/darwin/ios/framework/Source/accessibility_bridge_test.mm b/shell/platform/darwin/ios/framework/Source/accessibility_bridge_test.mm
index ac44da5370b9d..e9e598be039ba 100644
--- a/shell/platform/darwin/ios/framework/Source/accessibility_bridge_test.mm
+++ b/shell/platform/darwin/ios/framework/Source/accessibility_bridge_test.mm
@@ -73,6 +73,7 @@ @implementation MockFlutterPlatformFactory
 namespace flutter {
 namespace {
 class MockDelegate : public PlatformView::Delegate {
+ public:
   void OnPlatformViewCreated(std::unique_ptr<Surface> surface) override {}
   void OnPlatformViewDestroyed() override {}
   void OnPlatformViewScheduleFrame() override {}
@@ -101,7 +102,6 @@ void LoadDartDeferredLibraryError(intptr_t loading_unit_id,
   void UpdateAssetResolverByType(std::unique_ptr<flutter::AssetResolver> updated_asset_resolver,
                                  flutter::AssetResolver::AssetResolverType type) override {}
 
- private:
   flutter::Settings settings_;
 };
 
@@ -147,7 +147,9 @@ - (void)testCreate {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -169,7 +171,9 @@ - (void)testUpdateSemanticsEmpty {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -198,7 +202,9 @@ - (void)testUpdateSemanticsOneNode {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -245,7 +251,9 @@ - (void)testIsVoiceOverRunning {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -277,7 +285,9 @@ - (void)testSemanticsDeallocated {
         std::make_shared<flutter::FlutterPlatformViewsController>();
     auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
         /*delegate=*/mock_delegate,
-        /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+        /*rendering_api=*/mock_delegate.settings_.enable_impeller
+            ? flutter::IOSRenderingAPI::kMetal
+            : flutter::IOSRenderingAPI::kSoftware,
         /*platform_views_controller=*/flutterPlatformViewsController,
         /*task_runners=*/runners,
         /*worker_task_runner=*/nil,
@@ -336,7 +346,9 @@ - (void)testSemanticsDeallocatedWithoutLoadingView {
         std::make_shared<flutter::FlutterPlatformViewsController>();
     auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
         /*delegate=*/mock_delegate,
-        /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+        /*rendering_api=*/mock_delegate.settings_.enable_impeller
+            ? flutter::IOSRenderingAPI::kMetal
+            : flutter::IOSRenderingAPI::kSoftware,
         /*platform_views_controller=*/flutterPlatformViewsController,
         /*task_runners=*/runners,
         /*worker_task_runner=*/nil,
@@ -381,7 +393,9 @@ - (void)testReplacedSemanticsDoesNotCleanupChildren {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -475,7 +489,9 @@ - (void)testScrollableSemanticsDeallocated {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -547,7 +563,9 @@ - (void)testBridgeReplacesSemanticsNode {
   auto flutterPlatformViewsController = std::make_shared<flutter::FlutterPlatformViewsController>();
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/flutterPlatformViewsController,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -619,7 +637,9 @@ - (void)testAnnouncesRouteChanges {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -687,7 +707,9 @@ - (void)testRadioButtonIsNotSwitchButton {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -734,7 +756,9 @@ - (void)testLayoutChangeWithNonAccessibilityElement {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -818,7 +842,9 @@ - (void)testLayoutChangeDoesCallNativeAccessibility {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -893,7 +919,9 @@ - (void)testLayoutChangeDoesCallNativeAccessibilityWhenFocusChanged {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -967,7 +995,9 @@ - (void)testScrollableSemanticsContainerReturnsCorrectChildren {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1024,7 +1054,9 @@ - (void)testAnnouncesRouteChangesAndLayoutChangeInOneUpdate {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1121,7 +1153,9 @@ - (void)testAnnouncesRouteChangesWhenAddAdditionalRoute {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1207,7 +1241,9 @@ - (void)testAnnouncesRouteChangesRemoveRouteInMiddle {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1299,7 +1335,9 @@ - (void)testHandleEvent {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1343,7 +1381,9 @@ - (void)testAnnouncesRouteChangesWhenNoNamesRoute {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1413,7 +1453,9 @@ - (void)testAnnouncesLayoutChangeWithNilIfLastFocusIsRemoved {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1482,7 +1524,9 @@ - (void)testAnnouncesLayoutChangeWithTheSameItemFocused {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1557,7 +1601,9 @@ - (void)testAnnouncesLayoutChangeWhenFocusMovedOutside {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1634,7 +1680,9 @@ - (void)testAnnouncesScrollChangeWithLastFocused {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1707,7 +1755,9 @@ - (void)testAnnouncesScrollChangeDoesCallNativeAccessibility {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1782,7 +1832,9 @@ - (void)testAnnouncesIgnoresRouteChangesWhenModal {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1839,7 +1891,9 @@ - (void)testAnnouncesIgnoresLayoutChangeWhenModal {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1901,7 +1955,9 @@ - (void)testAnnouncesIgnoresScrollChangeWhenModal {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -1971,7 +2027,9 @@ - (void)testAccessibilityMessageAfterDeletion {
 
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2006,7 +2064,9 @@ - (void)testFlutterSemanticsScrollViewManagedObjectLifecycleCorrectly {
                                /*io=*/thread_task_runner);
   auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
       /*delegate=*/mock_delegate,
-      /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+      /*rendering_api=*/mock_delegate.settings_.enable_impeller
+          ? flutter::IOSRenderingAPI::kMetal
+          : flutter::IOSRenderingAPI::kSoftware,
       /*platform_views_controller=*/nil,
       /*task_runners=*/runners,
       /*worker_task_runner=*/nil,
@@ -2056,7 +2116,9 @@ - (void)testPlatformViewDestructorDoesNotCallSemanticsAPIs {
   thread_task_runner->PostTask([&] {
     auto platform_view = std::make_unique<flutter::PlatformViewIOS>(
         /*delegate=*/test_delegate,
-        /*rendering_api=*/flutter::IOSRenderingAPI::kSoftware,
+        /*rendering_api=*/test_delegate.settings_.enable_impeller
+            ? flutter::IOSRenderingAPI::kMetal
+            : flutter::IOSRenderingAPI::kSoftware,
         /*platform_views_controller=*/nil,
         /*task_runners=*/runners,
         /*worker_task_runner=*/nil,
diff --git a/shell/platform/darwin/ios/ios_context.mm b/shell/platform/darwin/ios/ios_context.mm
index 007de7a7105fd..2f58ebb7479a0 100644
--- a/shell/platform/darwin/ios/ios_context.mm
+++ b/shell/platform/darwin/ios/ios_context.mm
@@ -2,14 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#import "flutter/shell/platform/darwin/ios/ios_context.h"
+#include "flutter/shell/platform/darwin/ios/ios_context.h"
+#include "flutter/shell/platform/darwin/ios/rendering_api_selection.h"
 
 #include "flutter/fml/logging.h"
-#import "flutter/shell/platform/darwin/ios/ios_context_software.h"
+#include "flutter/shell/platform/darwin/ios/ios_context_software.h"
 
 #if SHELL_ENABLE_METAL
-#import "flutter/shell/platform/darwin/ios/ios_context_metal_impeller.h"
-#import "flutter/shell/platform/darwin/ios/ios_context_metal_skia.h"
+#include "flutter/shell/platform/darwin/ios/ios_context_metal_impeller.h"
+#include "flutter/shell/platform/darwin/ios/ios_context_metal_skia.h"
 #endif  // SHELL_ENABLE_METAL
 
 namespace flutter {
@@ -25,6 +26,11 @@
     std::shared_ptr<const fml::SyncSwitch> is_gpu_disabled_sync_switch) {
   switch (api) {
     case IOSRenderingAPI::kSoftware:
+      FML_CHECK(backend != IOSRenderingBackend::kImpeller)
+          << "Software rendering is incompatible with Impeller.\n"
+             "Software rendering may have been automatically selected when running on a simulator "
+             "in an environment that does not support Metal. Enabling GPU pass through in your "
+             "environment may fix this. If that is not possible, then disable Impeller.";
       return std::make_unique<IOSContextSoftware>();
 #if SHELL_ENABLE_METAL
     case IOSRenderingAPI::kMetal: